Leonabd b



L. B. SPERRY.

INTERNAL COMBUSTION ENGINE.

APPLICATION FILED JULY 5,1911.

1,322,640. Patented Nov. 25, 1919.

LEONARD 1B. SPERRY, OF BERW SEN, ILLINOIS, ASSIGNOR, BY MESNIZ. ASSIGNMENTS, TO INTERNATIONAL HARVESTER GOMPANY, A CORPORATION OF NEW JERSEY.

INTERNAL-COMBUSTION ENGINE,

Specification of Letters Patent.

Application filed July 5, 1911'. Serial No. 178,800.

To all whom it may concern:

Be it known that I, LEONARD B. SPERRY, a citizen of the United States, residing at Berwyn, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Internal-Combustion Engines, of which the following is a full, clear, and exact specification.

This invention relates to internal combustion engines, for supplying, from the cooling system therefor, water which, under certain conditions, forms a part of the fuel mixture supplied to the engine cylinders. 4

To prevent preignition or too rapid flame propagation, pounding, and to reduce the high temperature of the combustion chambers of internal combustion engines, certain fuel to quantities of water, under given load condi tions, are supplied to the air and liquid form a part of the fuel mixture which is drawn into the cylinders for developing power. WVater is usually drawn in with the mixture by the suction of the piston and the amount supplied controlled in various ways. The water, almost without exception, is taken from the supply which passes through the water aeket of the engine used for cooling purposes.

My invention finds particular application in connection with the water cooling systems for internal combustionengines shown in the Johnston and Longeneeker Patents, NOS. 1,129,099 and 1,129,100, and the Joh ston Patent, No. 1,129,101, granted February 28, 1915. v

By referring to these patents, it will be noted that the cooling water does not flow in a continuous stream fro-m the water jacket back to the cooling tank, but. on the contrary, flows intermittently. This is due to the fact that the water level in the system is such that there can not be a positive thermosyphonaction. or, in other words. the upstanding water outlet pipe leading from the water jacket normally contains water only up to a given level lower than the top of the pipe. As a result thereof, water is ejected from the water jacket and outlet pipe only when sufficient steam is generated and pocketed in the water jacket. hen suflicient steam is generated, the water in the outlet pipe is ejected therefrom in a and more particularly to means geyserlike manner and is passed into the coollng tank. Under these conditions it would be impossible to draw water having a sufficient head from the normally dry part of the cooling system before the en-- glne was warmed up, to supply to a carbureter above the cylinders.

Therefore, the main object of my invention is to insure a proper supply of water to the fuel mixture at any and all times that it 15 required in the operation of internal combustion engines.

.Another object is to provide anovel water supply arrangement for the purpose indicated to meet all of the requirements for successful commercial operation.

These and other objects are accomplished by prov ding, in combination, an internal combustion engine having a cylinder, a water cooling system therefor including a water jacket surrounding the cylinder, through which there is an intermittent flow of water, and means for drawing water from a reservoir connected with the normally dry part of said cooling system above the water jacket whether or not water is passing from the water jacket.

The invention is illustrated on the accompanying sheet of drawings, in which- Figure 1 is a fragmentary side elevation of any internal combustion engine embodymg my invention;

, -"Fig. 2 is a detail sectional view of part of the water cooling system;

Fig. 3 is a fragmentary end elevation of the same part shown in Fig. 2; and

Fig. 4 is a detail sectional viewof the suction control valve which controls the supply of water to the carbureter where the ingredients of the explosive mixture are combined.

The various novel features of my invention will be apparent from the following description and drawings and will be particularly pointed out in the appended claims.

("ompletc detail drawings and a. complete detail description of the arrangement disclosed in the Johnston and Longenccker and Johnston patents above referred to will not be given. Those parts which are necessary to the understanding of the invention have been shown in the drawing and will be hereinafter described.

Patented Nov. 25, 1919.

I have chosen to disclose my invention in connection with an internal combustion e11- gine having a cylinder 10 having a water jacket 11. Secured to the head 12 of the cylinderis acarbureter 13 having an air 1ntake pipe 14, liquid uel supply means 15, and water supply means 16. The resultlng mixture is passed 01' drawn down through the conduit 17 into the combustion chamber of the cylinder, where the mixture 1s compressed, ignited and expands for doing work. I am concerned mainly in the supply of water to the carbureter, which water, as stated above, forms a part of thefuel m1xture. This water is taken from the water cooling system, which includes the water jacket 11 surrounding the engine cylinder, water outlet pipe 19, and a horizontally arranged pipe 20 leading to the cooling tank, as shown in the patents hereinabove referred to. The cooling water may be supplied to the water jacket in the manner shown and described in said patents. Such patents disclose a water cooling system in which the water does not flow continuously, but in which the water flows intermittently. Normally the water in the upstanding pipe is at a level lower than the top of said pipe. Let it be assumed that it is at the level indicated by the line 21. With the water at this level, it is apparent that it would be quite impossible to supply water under a sufficient head or pressure to the carbu'reter at the desired height for proper control purposes. Preferably the water should be drawn from a. level sufiieiently above'the point at which it enters the carbureter to insure a proper supply thereto in accordance with working demands of the engine. As shown in Fig.1 of the drawings, 1 have provided a water pocket 22 from which water may be supplied to the earbureter through a pipe having a hand operated valve 2% therein,

water pipe 25 connecting with a valve casing 26 in which is mounted a needle valve 27, which .is normally held against the seat 28 of the valve by a spring 29 compressed between a suction disk 30 on the valve 27 and an abutment 31 of a screw 32, which may be adjusted in the valve casmg to vary the tension of the spring 29. From one side of the valve casing a pipe 33 leads into the mixing chamber 34 of the carburetor 13. It is seen, therefore, that Water may be drawn from the water pocket 22 into the mixing chamber 34 of the carbureter, and from there down into the combustion chamber under the influence of the suction of the piston, which is effective in lowering the needle valve 27 from its seat against the ac- 1 tion of spring 29.

the engine, but before the engine has had an opportunity to become warm enough to cause its cooling water to boil, it is highly important many times that water should be drawn into the carbureter to forma part of the fuel mixture. As a matter of\fact, by experience it has been found that water is needed in the mixture before the water in the water jacket becomes very hot, and especially hot enough to be changed into steam. As before stated, in this system of cooling, it is necessary that steam be formed in the water acket before any water can be ejected from the jacket-and from the upstanding outlet pipe leading therefrom. Under these conditions it is apparent that unless some special means is provided, there will not be suflicient pressure in the water cooling system to supply water to the carbureter at the desired height. To meet the requirement, therefore, the water pocket 22 has been provided in the pipe 20 at the proper height, and this water pocket always contains water which it has received during previous ejections of water from the water jacket and upstanding pipe 19.

It is apparent, therefore, that by means of the provisions of the water pocket 22,'Water may be supplied from the water cooling sysleft in the pocket after stopping the engine to supply to the carbureter upon the next starting be ore the engine has become sufficiently heated to cause a complete circulation 1n the cooling svstem. To drain. thev .pocket a suitable removable vided It 1s apparent that there may be various modifications of the arrangement herein particularly shown and described, and it is my intention to cover all such modifications which do not involve a departure from the scope of the invention as set forth in the following claims.

What I claim as new is: I 1. In combination, an internal combustion plug 38 is 'pro-' engine having a cylinder, a circulating water cooling system therefor in which the flow of water is intermittent, and means above the normal level of the water in the system whereby water may be taken therefrom when'there-is no How of water in the system.

2. In combination. an internal combustion engine having a cylinder. a carburetor operatively associated with the cylinder, a circulating water coolingsystem for the cylinder in which the flow of water is intermittent, and means above the normal level of eratively associated with the cylinder, a circulating water cooling system for the cylinder in which the flow of water is intermit tent, and a water pocket associated with said system whereby water may be supplied therefrom to said carbureter when there is no flow of water in the system.

5. In combination, an internal combustion engine having a cylinder, a circulating Water cooling system therefor in' which the flow of water is intermittent, a1id a Water pocket associated therewitlrabove the normal level of the water in the system whereby water may be taken from the Water pocket when there is no flow of water in the system;

6. In combination, an internal combustion engine having a cylinder, a carbureter operatively associated with the cylinder, a circulating water cooling system for the cylinder in which the flow of Water is intermittent, and a water pocket associated with the 7 system above the normal level of the water therein whereby water may be supplied from i the water pocket to said carbureter when there is no flow of water in the system.

7. In combination, an internal combustion engine having a cylinder, a carbureter operatively associated with the cylinder, a circulating water cooling system for the cylinder in which the flow of water is intermittent, a water pocket associated with the sys- I tem, a connection between said water pocket and carbureter, and control. means in said' connection whereby water may be supplied from said water pocket to the carbureter &

when there is no flow of water in the sys tem.

8. In combination, an internal combustion engine having a cylinder, a carbureter operatively associated therewith, a circulating water cooling system for said cylinder including a water pocket, and means whereby water may be supplied from said pocket to said carbureter.

9. In combination, a system requiring a constant water supply and an intermittent, water circulating system associated there with, a water pocket in said circulating system which acts as a source of constant wa ter supply for said first system.

10. In an internal combustion engine, a carbureter, a cylinder, a water jacket there for, a circulating system including saidwater jacket, a pocket in said system which is intermittently filled from said system, and means for constantly supplying water from said water pocket to said carbureter.

11. In an internal combustion engine, a carbureter, a cylinder, a Water jacket therefor, a circulating system including said water jacket, a pocket in said system which is intermittently filled from said system, and means for constantly supplying water from said water pocket to said carbureter depending for its action on the suction in said cylinder.

12. In an internal combustion engine, the combination of a carbureter, a cylinder, a water jacket therefor, and a water circulating system including means for providing in a part thereof a continuous supply of water, means for supplying water to said carbureter from said part, and in another part including said jacket an intermittent flow of water.

13. In an internal combustion engine, the combination of a carbureter, a cylinder, a water jacket therefor, and a water circulating system including means for providing in a part thereof a continuous supply of water, gravity means for supplying water to said carbureter from said part, and in another part including said jacket an intermittent flow of water.

In testimony whereof I aflix my signature.

' LEONARD B. SPERRY. 

